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Lens and backlight module having the lens

a backlight module and lens technology, applied in the field of lenses, can solve the problems of poor illumination of light at the periphery of the led package, unfavorable performance of the backlight module, and inability to uniformly emit light from the led package into the light diffusion board

Inactive Publication Date: 2015-10-27
HON HAI PRECISION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The solution enhances the uniformity of light emission, improving the performance of the backlight module by efficiently refracting light from the center and periphery of the LEDs, thereby increasing the module's illumination capabilities.

Problems solved by technology

The light at a periphery of the LED package is relatively poor to illuminate.
Therefore, the light emitted from the LED packages can not be uniformly emitted into the light diffusion board.
When this happens, the performance of the backlight module will be unfavorably affected.

Method used

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  • Lens and backlight module having the lens
  • Lens and backlight module having the lens
  • Lens and backlight module having the lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013]An exemplary embodiment of a backlight module in accordance with the present disclosure will now be described in detail below and with reference to the drawings.

[0014]Referring to FIG. 1, a backlight module 100 in accordance with an exemplary embodiment is provided. The backlight module 100 can be used for illuminating a liquid crystal display (LCD, not shown).

[0015]The backlight module 100 includes a substrate 10, a lighting chip 20 mounted on a top surface of the substrate 10, a lens 30 covering the lighting chip 20, and a light diffusion board 40 located over and spaced from the lighting chip 20 and the lens 30. Light emitted from the lighting chip 20 is successively refracted by the lens 30 and the light diffusion board 40 to emit out uniformly. In this embodiment, the lighting chip 20 is a light emitting diode (LED), and the backlight module 100 is a direct-type backlight module 100.

[0016]The substrate 10 is a flat plate. A circuit (not shown) is arranged on the top surfa...

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PUM

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Abstract

A lens includes an incident surface and a light output surface. A plurality of light diverging portions is arranged on the light output surface and around a center of the light output surface. The light diverging portions each are a ring and are spaced from each other. An inner light diverging portion has a refraction angle larger than that of an outer light diverging portion. Light emitted into the lens from the incident surface is diffused by the light output surface and the light diverging portions to radiate out of the lens. A cross section of each light diverging portion has a shape of a triangle. The present disclosure also relates a backlight module using the lens.

Description

BACKGROUND[0001]1. Technical Field[0002]The disclosure generally relates to lenses, particularly, to lenses employed in direct-type backlight modules, which can evenly diffuse light emitted from LED packages of the direct-type backlight module.[0003]2. Description of Related Art[0004]A typical backlight module includes a substrate, a plurality of light emitting diode (LED) packages arranged on the substrate, and a light diffusion board spaced from and located over the LED packages.[0005]However, each LED package generates a smooth round light field, and the light emitted from the LED package is mainly concentrated at a center thereof. The light at a periphery of the LED package is relatively poor to illuminate. Therefore, the light emitted from the LED packages can not be uniformly emitted into the light diffusion board. When this happens, the performance of the backlight module will be unfavorably affected.[0006]What is needed, therefore, is a lens and a direct-type backlight modul...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F21V5/04F21V5/00G02B19/00F21Y101/02
CPCF21V5/045F21V5/002F21V5/04G02B19/0014G02B19/0061F21Y2101/02F21Y2115/10
Inventor LIN, I-THUN
Owner HON HAI PRECISION IND CO LTD